Systems and methods for rotating coalescers maintaining positive recirculation through a dynamic seal

A crankcase ventilation system, comprising:

• a housing;
• an inlet configured to receive blowby gases from an internal combustion engine and to provide the blowby gases to the housing;
• an outlet configured to provide filtered blowby gases from the housing and to at least one of an intake of the internal combustion engine and a surrounding ambient;
• a rotating separating element positioned within the housing such that a gap exists between the rotating separating element and the housing, wherein the gap permits gas flow between a clean side of the rotating separating element and a dirty side of the rotating separating element;
• and
• a central shaft coupled to the rotating separating element, the central shaft rotatable such that when the central shaft rotates, the rotating separating element rotates and creates a pumping pressure that causes a high pressure within the housing on the clean side of the rotating separating element and a low pressure on the dirty side of the rotating separating element, thereby causing a positive recirculation of the blowby gases in which a portion of already filtered blowby gas from the clean side of the rotating separating element returns through the gap to the dirty side of the rotating separating element.